just throwing a list together here for the 30m/40m iGates operating 300bps APRS here in VK.
If you seriously going to be travelling the outback, or maritime mobile around VK, then HF APRS is good for your safety, it is 300bps APRS, 10.147600 MHz USB, 7.036 MHz LSB
VK1IAN-1 30m ACT
VK2NA-11 30m Newcastle
VK2OL-10 30m Sydney
VK4AB-4 30m Brisbane
VK4MQ-4 30m Toowoomba (Direwolf)
VK4MQ-5 30m Toowoomba (UIview-32)
VK5ARG-3 30m & 40m Balaklava
VK5DW-5 30m Berri
VK5RM-4 30m Adelaide
VK5THB-4 30m Waikerie
VK6LD-4 30m Perth
VK7KPC-4 30m Launceston
VK7ZRO-4 30m & 40m Hobart
VK8KMD-10 30m Alice Springs
VK8JG-5 30m & 40m Darwin
Surprisingly, the ZL's don't appear to have any HF APRS iGates, with all that mountainous country, I thought their VHF APRS would have a lot of coverage holes.
And places like New Caledonia, Vanuatu, Fiji and Tonga don't have any HF iGates, considering the maritime mobile traffic from visiting hams in that region.